Valves

The valve clearance should be check and, if necessary, adjusted every 30,000 miles (48,000 km).

Air cleaner

Replace the air cleaner cartridge with a new one every 30,000 miles (48,000 km). The cartridge should be replaced more often when driving under dirty and dusty conditions, The filter cannot be cleaned and, therefore, should always be replaced with a new one.

Vacuum fittings, hoses and connections

Unstable idle, misfiring, or poor emission control is often caused by leaking vacuum hoses or connections. Check hoses and connections on distributor vacuum unit, connections on heater control servo systems and hydraulic brake servo.

Checking and adjusting idle air control system

Your Volvo is equipped with an electronically-controlled idle air control system that requires no checking or adjustment.

Fuel system cap, tank and lines, and connections

The effectiveness of the fuel system to contain hydrocarbons is dependent largely on a leakfree system. Check for proper sealing of gasoline filler cap which contains "0" ring-type seals. Check all evaporative hoses in vehicle for tightness. Check fuel lines under vehicle and repair if necessary.

Fuel (line) filter

The fuel line filter is located next to the fuel pump. This filter should be replaced every 100,000 miles (160,000 km). The filter is replaced as one complete unit.
Replace more frequently if contaminated fuel is introduced into the tank (or if there is reason to suspect that this has occurred).

Timing belt

B230 FD/B 230 FT

Replace timing belt every 100,000 miles (160,000 km)

Three-way Catalytic Converter

This is a supplementary device in the exhaust system, designed to clean exhaust gases. This device is mainly a container with a ceramic material insert, designed to let the exhaust gases pass through channels in the insert. The channel walls are covered by a thin layer of platinum-palladium. These metals act as catalysts, permitting a chemical action to occur without actually taking part in it. The emission (CO, HC, NOx) content will increase if the three-way catalytic converter is damaged. Vehicles equipped with heated oxygen sensors use three-way catalytic converters containing platinum and rhodium.

CAUTION: Vehicles with a three-way catalytic converter must use unleaded fuel only. Otherwise the three-way catalytic converter will become ineffective. See "Fuel requirements".

Charge air cooler (Intercooler)

The B230F-Turbo engine employs a turbocompressor to force air into the engine inlet manifold and a charge air cooler to cool the compressed inlet air. The resulting increase in air flow raises pressure in the intake manifold by approx. 8 psi (over atmospheric pressure) and engine power output by approx. 46 horsepower over that developed by the normally-aspirated engine.
The charge air cooler (which resembles a radiator) is located between the turbocompressor and inlet manifold.

Evaporative control system

The 940 is equipped with a gas-evaporative control system, which prevents gasoline fumes from being released into the atmosphere. The system is comprised of an expansion chamber in the fuel tank, and a charcoal canister with built-in vacuum valve under the left-front wheel housing. The components are interconnected by hoses which channel fuel vapor from the gas tank to the charcoal filter, where it is stored until the engine is started and then drawn into the engine's fuel-induction system.

Crankcase ventilation

The engine is equipped with positive crankcase ventilation which prevents crankcase gases from being released into the atmosphere. Instead, the crankcase gases are admitted to the intake manifold and cylinders.

PCV system

The PCV nipple in the intake manifold should be removed and inspected every 60,000 miles (96,000 km).
Check/replace hoses at the same time.

Exhaust Gas Recirculation (EGR)

This system operates by returning some of the exhaust gases to the engine to be recombusted: since this lowers the combustion temperature the amount of nitrogen oxides released into the atmosphere is reduced.

The EGR valve should be cleaned at 100,000 miles (160,000 km) and thereafter cleaned every 20,000 miles (32,000 km).

Replacing spark plugs

The spark plugs should be changed every 30,000 miles (48,000 km). However, city driving or fast highway driving may necessitate changing after 15,000 miles (24,000 km) of driving. When installing new plugs, be sure to fit the right type and use correct torque, see Specifications. When changing the plugs, check that the suppressor connectors are in good condition. Cracked or damaged connectors should be replaced. When changing the spark plugs, clean the terminals and the rubber seals.

CAUTION: Do not use silicone-based lubricants, which can have adverse effects on electrical components.

Battery:

Turn radio off before disconnecting the battery. If the radio has an anti-theft code and the battery has been disconnected, the code must be re-entered before the radio will function properly.

Batteries contain corrosive and toxic acids. It is of the utmost importance that old batteries are disposed of correctly. Your Volvo dealer can assist you in this matter.

pg. 8:12 Brake fluid, Power steering fluid

Brake fluid

The fluid level should be above the min mark.

Fluid type: DOT 4+
Replace*: every second year or 30,000 miles (48,000 km). The brake fluid should be replaced once a year or every 15,000 miles (25,000 km) when driving under extremely hard conditions (mountain driving etc.)

Check, without removing the cap, that the level is above the "MIN" mark of the fluid reservoir.
Always entrust brake fluid changing to an authorized Volvo dealer.

* At owner request

Power steering fluid

The fluid level should lie between the MIN and MAX marks on the dipstick.
Check fluid level with engine idling and after driving while the fluid still is hot. Wipe the reservoir clean.

Fluid type: ATF
Replace: No fluid change required.

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